Marc Cucurella has said he understands the criticism directed at Spain following a mixed run of performances at the World Cup, as the side prepares for a round of 32 clash against Austria.

The Spain full-back acknowledged that supporters and observers have had cause to question the team's displays, but struck a determined tone when addressing the situation.

"We know what we have to do," Cucurella said, signalling that the squad are aware of what is at stake as the knockout rounds begin.

Spain will need to raise their level if they are to progress deep into the tournament, and Cucurella's comments suggest the players are under no illusions about the challenge ahead.